org.apache.calcite.util

Class NameSet

java.lang.Object

org.apache.calcite.util.NameSet

public class NameSet
extends Object

Set of names that can be accessed with and without case sensitivity.

Field Summary

Fields

Modifier and Type	Field and Description
static Comparator<String>	COMPARATOR Comparator that compares all strings differently, but if two strings are equal in case-insensitive match they are right next to each other.
private NavigableSet<String>	names

Constructor Summary

Constructors

Modifier	Constructor and Description
	NameSet() Creates a NameSet, initially empty.
private	NameSet(NavigableSet<String> names) Creates a NameSet based on an existing set.

Method Summary

Modifier and Type	Method and Description
void	add(String name)
boolean	contains(String name, boolean caseSensitive) Returns whether this set contains the given name, with a given case-sensitivity.
static NameSet	immutableCopyOf(Set<String> names) Creates a NameSet that is an immutable copy of a given collection.
Iterable<String>	iterable() Returns the contents as an iterable.
Collection<String>	range(String name, boolean caseSensitive) Returns an iterable over all the entries in the set that match the given name.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

COMPARATOR

public static final Comparator<String> COMPARATOR

Comparator that compares all strings differently, but if two strings are equal in case-insensitive match they are right next to each other. In a collection sorted on this comparator, we can find case-insensitive matches for a given string using a range scan between the upper-case string and the lower-case string.

names

private final NavigableSet<String> names

Constructor Detail

NameSet

private NameSet(NavigableSet<String> names)

Creates a NameSet based on an existing set.

NameSet

public NameSet()

Creates a NameSet, initially empty.

Method Detail

immutableCopyOf

public static NameSet immutableCopyOf(Set<String> names)

Creates a NameSet that is an immutable copy of a given collection.

add

public void add(String name)

range

public Collection<String> range(String name,
                                boolean caseSensitive)

Returns an iterable over all the entries in the set that match the given name. If case-sensitive, that iterable will have 0 or 1 elements; if case-insensitive, it may have 0 or more.

contains

public boolean contains(String name,
                        boolean caseSensitive)

Returns whether this set contains the given name, with a given case-sensitivity.

iterable

public Iterable<String> iterable()

Returns the contents as an iterable.